Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5311aafb287f3c23e02315367fc0d41de819a52567195ed072fa3ad6d6dc2baa' 
  AND token = 'PqN60UxIkkp5NBEb75LXpBa8SS6JyfpRAwyK0Us7w+Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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