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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '40265384a347b452845b5fda75e2f6edbeb823371b73db18821f44a344059ac3' 
  AND token = 'UXhMwwkDxTgJ95gtoZiFwsW5Edvp6/L4A/ZyztzbW6E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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