Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dd29bdfe6a20f18b568f71135c971af9ad51e6027e89c08b1bdd7fb17f555f7d' 
  AND token = 'cj3k1D9RKJkSc8e0iMjFd+Svwz6sQJD+eWLpw3CsviA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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