Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7437e2c6f3e227b0cbef7019899f06cbef034d826e00dfa7dc3b3f7b72d24a6d' 
  AND token = '04rU21TcGJ5VZd9gUGwJlqnzsJhEDIMQE0zA6ULHTxs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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