Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '259178898aca09b3eb90f6a60fff14414a16f6393f9dd808271ef7da1c0f21e5' 
  AND token = 'TFzN4IwiX+f8G+qmrtGxMvha62uG34GdxPyLSuloMu0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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