Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '131c549ce9ee7303c5483c63a9ebfff187ccc7d28cc5c4702ed77bc05fcf70af' 
  AND token = 'H0TDYCl7XtHgvtB6V34ICcBNg7ZTJUr+MVaRq0O4MME=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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