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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '063f9e28b044c5208cb6b12ce8d7668dff01e0c5ff492661e5fad116c34ce522' 
  AND token = 'Ifji5acCGZoVD75BtYMqzPfiAM1jYu6/LJz2yFioLlI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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