Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b4919d7e31dbb388a7482e0b7ff8d96c33537abe98175c117e3636c4aa6d7412' 
  AND token = 'Fpp+41v4knJpbLEXseDtj6OXGezgCr5LcL/zFNCr7xE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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