Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e645f9345c61dda2c81210824a78cc3ca443ac2b19faf91caa26b5962b155fe4' 
  AND token = 'zMsqV7Ft6kj4yxF8kJyKfzAPqDay7fs1BBk9RiNvdTo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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