SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '61c42d48537babd70614bdff3caaf533c20972973f310eb2f1b96901dab99da0' 
  AND token = '/utAJxhxjZgq9P5H+16MJ2kTgXJPKgE2m5WhFvEkctg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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