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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eee046f91ec8d89decd734d4033c0314b225c263fe971b1ac27dba437a009427' 
  AND token = 'J56eiw+revAXH7GW+WnCLsCikxUrH3q89WHuLo/wpvo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}