Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '29d5fe9e19d58df5201dda3323fa6880ad0c59330ce8c7a9baae88013cfcf61b' 
  AND token = 'yBXrz9kl7VRtkFurahDPwfzO9WBvfmRckiJim1VUXYo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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