Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '888dd470a864b3e408b335932539be25f577eb9234a73af09013850004163ed1' 
  AND token = 'W0pSM6b5QvRyMCtjQ6qlsIkrqj9Avq2fWW5IoNZn+Kg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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