SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '195f29ee1c14d65b6780d430cb50b347d4f3496c68c4070a4f9fafbb59579278' 
  AND token = 'UJcoI+Nb/uoz1XJS+S6itKAgPPHdQITLvBm5q3ZD/mw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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