Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '354877a843466878086038313c97cab9cb424b7e4110ff8fc8ead3622d6f2217' 
  AND token = '9MCo4zAER2LF2reoAeZI87RcGPEm6Sg0zbfSzoa80h4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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