Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6820b61b0a51375dc5819604ed6f7320d6e3037428e80d8c514f00e9202b4e4f' 
  AND token = 'fIYCO4H05Fo091JoRQQm7HUmL0VLBza2bDkDJD4FnZc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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