Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4bc9041a3f262a32e51be99d8ecca9b82d2d367900d6853a4df2f777c949a822' 
  AND token = 'WYKRpz1UfWLNQPP4TfYrmPMIxQ5WyS7kagYkAT7JsRg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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