Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9efb7978cb2fdf0bda136dcc2a7f5c89eb623a6467ac76a1e1717b3b9ac9ee25' 
  AND token = 'ljMAVVXXSowDkoFpZ6uIP8xbb19bbzjmKECvE7k7u68=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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