Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '56236bfebc238012c95649c640db093f432b46338be33469c583e7060f83e297' 
  AND token = 'GmoTqMDfBhzm2exNFrVp3z+A2Mt4CUGlk7A3WR8/E08=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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