Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '181fdd83eb224bea4ed2fd93944b4667a283b3470fda7e8764f57e568b287a94' 
  AND token = 'Qv7ABcKLuMvuDIV33HBYr0CU+xPQPOZBpS77bo3wkiA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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