Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '866b9153403755ca4ab6510712f09ad5cb3fd6d234a22d59a09d449ccf080770' 
  AND token = 'e444nT+iZfNMt2WlzvJ9YZ9+alXu2uUd0oDC7odc4Es=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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