Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e25d83c03d22cce1c22edccb339ebb9fcc45a967ea1084f5bfcf056e44950e66' 
  AND token = 'FdYg1QfCSasz9ajr9TtjLoPB29fnfocMG4BJBFuDdt4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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