Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '422ffc8e57410df13e71eb02c4d2eb2f3b0c0550f168b9505aa65d8d91f28ce3' 
  AND token = 'TkF55MsTokMp9qFK+Evq8JiliOgILP+AKe03NyJ51H8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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