Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6e426694f1886ed9473817daa594bbcaeda9f117550d3cc771e32762d2995392' 
  AND token = 'QGw3411aALZUozXG38RHfM8nkOkAtx5/JIquA181xtM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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