Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6f3f546475fb15347a860aaa024aab94cf167880b6a79623df0bd5c9ba19e485' 
  AND token = 'dWTqjAPyXaKPizy1tgcSvcP4Dk937IEYYganv/EGajc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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