Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b57ac8dccfd46efb67a3182c374c21c35507f994793e4c1d0981d26d55568d1d' 
  AND token = '9VWnMm5w6OTkAAG8+yMTBJhVJO+K3XMHT0KFHEJ7NTs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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