Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f92008ec43f2f7de46e3be7734a73e1d144c262da0c4f312af2be17baebd56c7' 
  AND token = 'loAt4lr4rjRiO71BcSFefhSgxexnShYUWm0bNJDkHHI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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