Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '88127faa383d8ec9f7d659e6461d3d4e58c2f305ea3f27aedaba4d632d2f2449' 
  AND token = 'EHcy4IEO0Q6OvLWog5SIcugIDSkk/+lFF0ooFBfVxwg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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