Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '236037e17dd6bd4825b4ffdb93b8cf24883620c0747dbbd0777572f9f89d0eb8' 
  AND token = 'A1WZEXJSEKFaAyS3uPfjZH8Tft8Xr28lJmSb+t9N3hg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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