Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2472013d792fa885fdd7c8eaca3ce4077a5df8a1705c90a82df9c506f891ee43' 
  AND token = 'TNc+x8ZpeKb0C+PPxmheWTvMxFgKTtURZZLnRQ3S66k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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