Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c33b6ccaeb6f583603e143daaab06270dd1249572baf74ad2d92b554c72ad370' 
  AND token = 'igFJ5CRcBW/KNQXOl3Px/iiSdamKNguhQ9jtBb/wFac=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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