Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c57d1d1dd183d622cdf2cc44ddef03f11a143da96b7a97b62817b8f92d0ccd24' 
  AND token = 'MXaXxy87U/Gv3PZruEZPlMHm2mV41pus/izJ+qTqEBM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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