Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c35b60db2e7eae07b1442bb1bf9155b98317db25c8c135dc4458596654cf9180' 
  AND token = 'AH9VPJaq2NOEZUOExWVlR6ZPgdZjdH5dv6ZHtBySXTU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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