Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b60185d2c0cabba6c73db1769fae7c368c53cb56a55c5f7dfa0008bfac1a40b6' 
  AND token = '8jKsXLIcsNc2WbC9Q8m+gxmmYul8hQPgpAxDLUsijl4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}