Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4480bd9e1339e987f9d6c93042665c129f6ba86c01e9440752acf27d13bbb320' 
  AND token = 'XFHObuU8Q2xrQ3mjwLxGWT+3oGreKed8flyWV/v2R4A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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