Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'feaddfd18708a2abad98fec8eeb91a6d6179de3f48305e51095e7a42754e62a0' 
  AND token = 'mQmoQesd3tZK6+hUcQF7gTzJcHqIRsVq9l9wY5CkP3c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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