Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8c9cefba852245ef858fbdf2127f21c25850a71d1bd94d035ba445b0ba36cbb4' 
  AND token = '+r98nhZ9D4H7lD1hftI/qGCCzR682TGz0Im2fFsW9i0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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