Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c8972525b833f051c02b3ec7998c4a5ed6bf9fdd05d659299ef600b82dd3c10c' 
  AND token = 'hdJGjgQ77fPl6DgHMP5Dx+IFDyfPwm+IrhP/y3mhBkE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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