Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '92e09eacda795cec8524a957c22c094b4c5afd495e63770a13b9f8b9505d0cae' 
  AND token = '8Tw/wbjzwogOgcZDbAPHA67g0HncJynhLYIPO8qiO8U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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