Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b2146fada49fe61395ff4dd95864f99fec8d4e07517c0637f2ef956edf449096' 
  AND token = 'txgE3fCzafzmTeCsTQ6sQa+5KxEzkZ+xlv1nK8Hq9LU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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