Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2623b7e7e118c3093b06c4d40b23c441880fe6555bb47d7a5c42a18ac2cc3d7d' 
  AND token = 'Swo21J2zfxYUvT3Cd3zpDPuc3o5kvQW8KibzE5IwUp4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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