Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fc366ecdfd3315ff9afcba22c5d278d16ec615ef72bce9823408def4cb10fe1b' 
  AND token = 'djNte+hDIGfoVt7w75plaRevOp8eeHxUx8Ck25t2OEU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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