Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b7f9c5a78da596dc5a214034433202a96f491c03a7a6612c39eee30cd25f9c69' 
  AND token = 'PpxDTSM/LPO3OJ4UoRirE1y07nN9K3EQBuZgtQhFFZU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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