Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '488a3061e1e40b480cd7cdea0a24d93237cb392b28afc1d71c35dced5399d806' 
  AND token = 'u/skGe87/8GMkaXs3WtYNs2UyifOPeFVtKCY5AmUJvg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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