Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ebadc56dcc1ad7544cc1eeeb0923ec1f4b14de14fac690596f2bf4dac2390519' 
  AND token = 'OzEWCtpo/Nf2ynBtUqmo2pMX6M/NotDTCmdMroWVB5g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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