Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3cb9b8d7e05c22e7d43c4b6c39a2608b87f39657526270f80e9e367fea435dea' 
  AND token = 'tzsse32twhO8R9v0dfK/6e3oBu1Fz1Ou8dOlyENOdVU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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