Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '82fa776da70b6f063ead178d534937e9d872e7305de82147e6fe30430831804a' 
  AND token = 'qg/SakKVJH9u0iyzEIs0A0YqdOqHR4GXiwbvRjTI3nA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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