Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3876dd2a1a6ce4ad954c140299945a0be9e865476a027427f55d226a09f71d8e' 
  AND token = 'hMkYwEG1w/voMFXLYTYlMG8FCZ2uGmGwz1krA9g9Yec=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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