Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '479843f5dd7a32b466704f07773cc7e6fd2f6ff7a2455d05c36573ce9be9d5d2' 
  AND token = 'HK1BaywEC1KpJj47b7sETGu1dStVc4fAHU9lUiy9Iyo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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