Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9ac336726872d19e8a2f3085f5e48ffa38f9188ace859ad2d6415344fd41d03c' 
  AND token = '/uZufd8iuv8PqSBnAHnZWe5JWsN08yNDk8tGUsVyQNU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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