SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '652622d46c4998603d6798c6d445f2d52d4e39271c051da3744834b32ba5ec8f' 
  AND token = 'kJSr/HXicS7Grs+8I7KRa6ZaVHYkOVgD5hMDwEN+9LQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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