Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b8216088e10615f4b4bbbd1a9b5019106786f1922b115629beb064b37360ec9c' 
  AND token = 'XcgfrpO69GRWg4xCcRUoAqq0MuX59cdwHiLiwXQMktU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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