Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b67802e7c1997264dbcef4dcfcb54f49eeb06ebcd6eccdfceaabc3572d35180f' 
  AND token = '6Y3o2MfPHAl6TDCl2V2J6aayYyqCrFHvSPh69zrzd/A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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