Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5dad2c742acbd36322f5e0c9b6172a4d40d778000419a4e0a721113614ad7a3e' 
  AND token = 'YZwR5XdXaRQaTf1p5BzwtJeqfv0NOs5yybNwRoh07gs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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