Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd214d5d534fee37cf48a4f8c01935b1638dc97bbc8dc8303615dc5a6d35c3c95' 
  AND token = 'sodk5fHC8G31Pqk83GtIovOcnY1d/6GJcBSMVjGeb5s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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