Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5ef31eb8e050962c46087e88ec54be45a249da23321dddcad53c4d3939ff5f88' 
  AND token = 'JgtN9KiWM9EVVLBUt6mQDfZ/XdD8bCZgQT7IkRQv/dU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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