Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3175c33aa34d944f353d7f3d8015586e4e76880296682f655e0ab9d930b53dd3' 
  AND token = 'jP3feAGYguppQyWUWjYGm6D2G1q++OkpPhs3r88Me1Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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