Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b5dc47843e76affe8451fd582b55f49ca125553b922fef4c065808f220b0df0e' 
  AND token = 'HlD9se8DsJdQx73xrzEmDaYmJr8GA0s+TrfcmlurFIM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00299

JSON explain

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