Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '652e2a1372f46a9fab67815d47b5d521b1977579f8c6645ddb8c7830b77fdad9' 
  AND token = 'hoB6gtJWN1mrsC3MpM0dSnBGS44zlvy9Rse41AjEOGA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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