Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '69a9530fe13a76fa9c8bf9012c575188029cf5c0149a887ec386fee301c2e564' 
  AND token = 'QRD8hhkbancKxw3oL0XBxAGjwCprbjaxmvWPvHDF3EE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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