Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'db6daf410866094ed352c041d869490c82d624d656625f17cc21eae8f75830ee' 
  AND token = 'gr2LOopsu4xxvdT3uERY8OYnPLFUggmssvZVBqgGQlE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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