Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd1c31166d70f3e5e2d6de1f43d649710e2d71ee74543d8e22286a38579c4f95d' 
  AND token = 'OoMnxZ+6DClYI3QvZnBAXS6HPAGFyjLh3qDl8cBfRoI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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