Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b029d742d7815bf8dee4e2d43e367ca5e8f36539d518a3549ad670b10cc95ccd' 
  AND token = 'SIIjmesUyEO7rnS7Bs+SYflUNADOzc9hLg4KnloTgZA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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