Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8c8dde0afa863317fc7b4d00306f2f229722610441a893c9b3d1a4bed52f4369' 
  AND token = 'UOvZfAE+WdDGGtURTPD8xyp6nFmUzVefEsfCqGzdgZ0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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