Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6b51071060d33b6887bbcebf38080df609bc960842627b55a3c22cefe7bd9d09' 
  AND token = '+Nea/Q7+RaXnoE5d2tAmReMZ0e2+fGG++5RHYUzy4oo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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