Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7745b7d131a9aaf50735603ab3f1252734a1b1afaf2527c4e18a1a2424e68bf3' 
  AND token = 'Kg7EemoFtgXr8M2e7bFlWYDSEUJmIzlF/0VRgOnZfVc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}