Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1a4a60afaa72f14fd42fc57d733cead89aabfd9c4ecf6d5676ed1585c4695f90' 
  AND token = 'wqe3db7+GDAOuZIarH9lo1E7shNZWBbdi1eafGWDh68=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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