Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd0ac4b8e6526a02ca44bedb928d84778ed7e9ec28eaa9555d29a43b55c32f74b' 
  AND token = 'goHtmIF/M/gpH9+kkrs9dnhAoIRMLSx+yegF1kU0+Fs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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