Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ff856ddb889b1c4b1cdafa809ec984a8adb65d2696eeac4835c6756e26cbdc66' 
  AND token = 'IELis7oRRXkjT46Gvy/Dw8cwyB1/a6IZWbEIZ2RmeSc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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