Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f3401c6282ec7a66ebb1d1fd245d0aa685c2ae668cdfb28da7629ad11ee44704' 
  AND token = '6k5wdLMLUO64cPe6MuKSuLojMdb7dEQFgK8/30cZ5co=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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