Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd1f925fab0a021c3c734dc657ea67ed1f323c0242f98a628d25152d24fe21f24' 
  AND token = 'HGHXtHwIUOcOr5kdlyan1Dm2P7BBCvjz5mRtC08Oqe8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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