Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07a2a8201cc3a4981730d8778a0862d541c210a52388b29e5e33db8ce1c8679b' 
  AND token = '2NXOw3MFgoQVgg2Oniy7NzbKsxyXnCnVrQwZTTFtUbc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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