Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c06dfc5bdf3ac34aa587df96b2f31df9676e358e4184fafb46665eff7fd4e12b' 
  AND token = 'Q6O2WTD9sWQhRYpHe+D4dNEicmSCexA5DZObzWbsX5E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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