Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee4a0a924c49d95902fb9e09fc5ff8d7e1b616dfa48bebe75599ede780d76847' 
  AND token = 'q9HJt21YNK1LNUPJMJXsmoCXFkB9at51EJS2kzTv+Es=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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