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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed241a4e46b2c6611673a79cf4011d9d863b4ae29583196f44bd4beb729cbd50' 
  AND token = '3AiSgCXkZx93dSasnadrDZL0v0SPgUx+PI24Zf+OGMA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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