Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9f3f9477fc36290e66fe569605bfda4a035587970775c23d15370d44a5d4da52' 
  AND token = 'ySDbPMhPkM9AdcQob20ZV0ZhiQMcQigtA7Wa3kY8ajo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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